Re: Packages for Feynman Diagrams
- To: firstname.lastname@example.org
- Subject: [mg10280] Re: Packages for Feynman Diagrams
- From: dreissNOSPAM@nospam.earthlink.net (David Reiss)
- Date: Sat, 3 Jan 1998 05:07:29 -0500
- Organization: EarthLink Network, Inc.
- References: <email@example.com>
In article <firstname.lastname@example.org>, bob mcnees <email@example.com> wrote: > Is anyone aware of any non-commercial packages for evaluating Feynman > Diagrams in Mathematica 3.0? Several of the older packages, like HEP or > older versions of FeynCalc, don't appear to be compatible with > Mathematica 3.0. Any help would be greatly appreciated. > >Robert McNees The following Mathsource items might be of interest: Mathsource item number 0202-194 "Generating Feynman Graphs and Amplitudes with FeynArts" By: Hagen Eck,Sepp Kueblbeck Mathsource item number 0202-251 "Feynman Parameters and Gamma Matrix Traces" By: Todd West Mathsource item number 0202-385 "FeynCalc 1.0: A Package for Feynman Diagram Calculation" By: Rolf Mertig As for HEP: Mathsource item number 0202-273 "HEP: A Package for Symbolic High-Energy Physics Calculations" By: Alexander Hsieh,Eran Yehudai fixing this so that it is 3.0 compatible would be a service to the particle physics community, and could be a good project "for the interested student." Its second named author is not available to do the job since he is quite busy working in another field (I don't know the wereabouts fo the frst named author). A while ago I took a very brief look at the code and had the following comments which folks could use to get started: (* *********************************************************** *) I have only taken the briefest look at the HIP code some while ago when a friend was asking me about it. I noticed two things which I wrote in my notes: -->Uses 3Literal2 -->Uses the undefined (in 3.0 and previously -->undocumented (in 2.2) function ValueList -->(Was ValueList a pre-2.0 function that was made obsolete in 2.0?) -->Also may have some other problems. If you ask Mathematica 3.0 about "Literal" it tells you: "Literal has been renamed HoldPattern" So, by simply putting the code: Unprotect[Literal]; Literal=HoldPattern; Protect[Literal]; in the beginning of the package, this problem should be fixed (or just editing the code to replace occurrences of Literal by HoldPattern. In the case of "ValueList" I have no idea. I assume that it is a pre 2.0 function that was made obsolete in subsequent versions. Perhaps a WRI person could inform us here (thanks!). Thus if you could find a version 1.1 Mathematica Manual, you could probably find out what "ValueList" is and guess at an appropriate function to substitute in its place. Let me know if you are able to make HEP work after this (and other needed) changes are made. Also, if you can get it up and running in 3.0 you chould post the resulting code to MathSource (after having friends and others Beta test it) Cheers, David -- David Reiss dreissNOSPAM@nospam.earthlink.net http://home.earthlink.net/~dreiss To send personal email, remove the words "nospam" and "NOSPAM" from the email address